Harper, C. W.; Boucot, A. J.; Walmsley, V. G. (1969). The rhipidomellid brachiopod subfamilies Heterorthinae and Platyorthinae (new). Journal of Paleontology. 43: 74-92.
481712
Harper, C. W.; Boucot, A. J.; Walmsley, V. G.
1969
The rhipidomellid brachiopod subfamilies Heterorthinae and Platyorthinae (new)